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Noun mifepristone has 1 sense
- abortion pill, RU 486, Mifepristone - an abortion-inducing drug (trade name Mifepristone) developed in France; when taken during the first five weeks of pregnancy it blocks the action of progesterone so that the uterus sloughs off the embryo
--1 is a kind of abortifacient, aborticide, abortion-inducing drug